George,
First, as per our last correspondence: did you get the turn signals straightened out?
As for the ign/lgt switch, since I also have that empty "L" terminal with no grub screw in it I can can only assume that the unit was used in many other vehicles.
To be perfectly honest, the only electrical system I've had time to fuss with is the ignition system. I need to retire.
There must be some EXU out there with all systems funtional as original-then again.............
Keep in touch,
Michael DeRentz
TC 9861 EXU